summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_ioctl.c
diff options
context:
space:
mode:
authorMiklos Szeredi <mszeredi@redhat.com>2021-04-07 15:36:43 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2021-04-12 16:04:29 +0300
commit9fefd5db08ce01abffffcdca3dc0964d9cb6ee69 (patch)
tree10c28adea54b9bab22080f9992909f20d580ed85 /fs/xfs/xfs_ioctl.c
parent1f26b0627b4613e623ba0c858a338ea7c77a55fb (diff)
downloadlinux-9fefd5db08ce01abffffcdca3dc0964d9cb6ee69.tar.xz
xfs: convert to fileattr
Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/xfs_ioctl.c')
-rw-r--r--fs/xfs/xfs_ioctl.c258
1 files changed, 62 insertions, 196 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 99dfe89a8d08..bbda105a2ce5 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -40,6 +40,7 @@
#include <linux/mount.h>
#include <linux/namei.h>
+#include <linux/fileattr.h>
/*
* xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
@@ -1053,73 +1054,15 @@ xfs_ioc_ag_geometry(
* Linux extended inode flags interface.
*/
-STATIC unsigned int
-xfs_merge_ioc_xflags(
- unsigned int flags,
- unsigned int start)
-{
- unsigned int xflags = start;
-
- if (flags & FS_IMMUTABLE_FL)
- xflags |= FS_XFLAG_IMMUTABLE;
- else
- xflags &= ~FS_XFLAG_IMMUTABLE;
- if (flags & FS_APPEND_FL)
- xflags |= FS_XFLAG_APPEND;
- else
- xflags &= ~FS_XFLAG_APPEND;
- if (flags & FS_SYNC_FL)
- xflags |= FS_XFLAG_SYNC;
- else
- xflags &= ~FS_XFLAG_SYNC;
- if (flags & FS_NOATIME_FL)
- xflags |= FS_XFLAG_NOATIME;
- else
- xflags &= ~FS_XFLAG_NOATIME;
- if (flags & FS_NODUMP_FL)
- xflags |= FS_XFLAG_NODUMP;
- else
- xflags &= ~FS_XFLAG_NODUMP;
- if (flags & FS_DAX_FL)
- xflags |= FS_XFLAG_DAX;
- else
- xflags &= ~FS_XFLAG_DAX;
-
- return xflags;
-}
-
-STATIC unsigned int
-xfs_di2lxflags(
- uint16_t di_flags,
- uint64_t di_flags2)
-{
- unsigned int flags = 0;
-
- if (di_flags & XFS_DIFLAG_IMMUTABLE)
- flags |= FS_IMMUTABLE_FL;
- if (di_flags & XFS_DIFLAG_APPEND)
- flags |= FS_APPEND_FL;
- if (di_flags & XFS_DIFLAG_SYNC)
- flags |= FS_SYNC_FL;
- if (di_flags & XFS_DIFLAG_NOATIME)
- flags |= FS_NOATIME_FL;
- if (di_flags & XFS_DIFLAG_NODUMP)
- flags |= FS_NODUMP_FL;
- if (di_flags2 & XFS_DIFLAG2_DAX) {
- flags |= FS_DAX_FL;
- }
- return flags;
-}
-
static void
xfs_fill_fsxattr(
struct xfs_inode *ip,
- bool attr,
- struct fsxattr *fa)
+ int whichfork,
+ struct fileattr *fa)
{
- struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df;
+ struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
- simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
+ fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
ip->i_mount->m_sb.sb_blocklog;
@@ -1131,19 +1074,33 @@ xfs_fill_fsxattr(
}
STATIC int
-xfs_ioc_fsgetxattr(
+xfs_ioc_fsgetxattra(
xfs_inode_t *ip,
- int attr,
void __user *arg)
{
- struct fsxattr fa;
+ struct fileattr fa;
xfs_ilock(ip, XFS_ILOCK_SHARED);
- xfs_fill_fsxattr(ip, attr, &fa);
+ xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ return copy_fsxattr_to_user(&fa, arg);
+}
+
+int
+xfs_fileattr_get(
+ struct dentry *dentry,
+ struct fileattr *fa)
+{
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+
+ if (d_is_special(dentry))
+ return -ENOTTY;
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
- if (copy_to_user(arg, &fa, sizeof(fa)))
- return -EFAULT;
return 0;
}
@@ -1210,7 +1167,7 @@ static int
xfs_ioctl_setattr_xflags(
struct xfs_trans *tp,
struct xfs_inode *ip,
- struct fsxattr *fa)
+ struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
uint64_t di_flags2;
@@ -1253,7 +1210,7 @@ xfs_ioctl_setattr_xflags(
static void
xfs_ioctl_setattr_prepare_dax(
struct xfs_inode *ip,
- struct fsxattr *fa)
+ struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
struct inode *inode = VFS_I(ip);
@@ -1280,10 +1237,9 @@ xfs_ioctl_setattr_prepare_dax(
*/
static struct xfs_trans *
xfs_ioctl_setattr_get_trans(
- struct file *file,
+ struct xfs_inode *ip,
struct xfs_dquot *pdqp)
{
- struct xfs_inode *ip = XFS_I(file_inode(file));
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
int error = -EROFS;
@@ -1299,24 +1255,11 @@ xfs_ioctl_setattr_get_trans(
if (error)
goto out_error;
- /*
- * CAP_FOWNER overrides the following restrictions:
- *
- * The user ID of the calling process must be equal to the file owner
- * ID, except in cases where the CAP_FSETID capability is applicable.
- */
- if (!inode_owner_or_capable(file_mnt_user_ns(file), VFS_I(ip))) {
- error = -EPERM;
- goto out_cancel;
- }
-
if (mp->m_flags & XFS_MOUNT_WSYNC)
xfs_trans_set_sync(tp);
return tp;
-out_cancel:
- xfs_trans_cancel(tp);
out_error:
return ERR_PTR(error);
}
@@ -1340,12 +1283,15 @@ out_error:
static int
xfs_ioctl_setattr_check_extsize(
struct xfs_inode *ip,
- struct fsxattr *fa)
+ struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
xfs_extlen_t size;
xfs_fsblock_t extsize_fsb;
+ if (!fa->fsx_valid)
+ return 0;
+
if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
return -EINVAL;
@@ -1390,12 +1336,15 @@ xfs_ioctl_setattr_check_extsize(
static int
xfs_ioctl_setattr_check_cowextsize(
struct xfs_inode *ip,
- struct fsxattr *fa)
+ struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
xfs_extlen_t size;
xfs_fsblock_t cowextsize_fsb;
+ if (!fa->fsx_valid)
+ return 0;
+
if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
return 0;
@@ -1422,8 +1371,11 @@ xfs_ioctl_setattr_check_cowextsize(
static int
xfs_ioctl_setattr_check_projid(
struct xfs_inode *ip,
- struct fsxattr *fa)
+ struct fileattr *fa)
{
+ if (!fa->fsx_valid)
+ return 0;
+
/* Disallow 32bit project ids if projid32bit feature is not enabled. */
if (fa->fsx_projid > (uint16_t)-1 &&
!xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
@@ -1431,14 +1383,13 @@ xfs_ioctl_setattr_check_projid(
return 0;
}
-STATIC int
-xfs_ioctl_setattr(
- struct file *file,
- struct fsxattr *fa)
+int
+xfs_fileattr_set(
+ struct user_namespace *mnt_userns,
+ struct dentry *dentry,
+ struct fileattr *fa)
{
- struct user_namespace *mnt_userns = file_mnt_user_ns(file);
- struct xfs_inode *ip = XFS_I(file_inode(file));
- struct fsxattr old_fa;
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
struct xfs_dquot *pdqp = NULL;
@@ -1447,6 +1398,16 @@ xfs_ioctl_setattr(
trace_xfs_ioctl_setattr(ip);
+ if (d_is_special(dentry))
+ return -ENOTTY;
+
+ if (!fa->fsx_valid) {
+ if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
+ FS_NOATIME_FL | FS_NODUMP_FL |
+ FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
+ return -EOPNOTSUPP;
+ }
+
error = xfs_ioctl_setattr_check_projid(ip, fa);
if (error)
return error;
@@ -1459,7 +1420,7 @@ xfs_ioctl_setattr(
* If the IDs do change before we take the ilock, we're covered
* because the i_*dquot fields will get updated anyway.
*/
- if (XFS_IS_QUOTA_ON(mp)) {
+ if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
VFS_I(ip)->i_gid, fa->fsx_projid,
XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
@@ -1469,17 +1430,12 @@ xfs_ioctl_setattr(
xfs_ioctl_setattr_prepare_dax(ip, fa);
- tp = xfs_ioctl_setattr_get_trans(file, pdqp);
+ tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
if (IS_ERR(tp)) {
error = PTR_ERR(tp);
goto error_free_dquots;
}
- xfs_fill_fsxattr(ip, false, &old_fa);
- error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
- if (error)
- goto error_trans_cancel;
-
error = xfs_ioctl_setattr_check_extsize(ip, fa);
if (error)
goto error_trans_cancel;
@@ -1492,6 +1448,8 @@ xfs_ioctl_setattr(
if (error)
goto error_trans_cancel;
+ if (!fa->fsx_valid)
+ goto skip_xattr;
/*
* Change file ownership. Must be the owner or privileged. CAP_FSETID
* overrides the following restrictions:
@@ -1529,6 +1487,7 @@ xfs_ioctl_setattr(
else
ip->i_d.di_cowextsize = 0;
+skip_xattr:
error = xfs_trans_commit(tp);
/*
@@ -1546,91 +1505,6 @@ error_free_dquots:
return error;
}
-STATIC int
-xfs_ioc_fssetxattr(
- struct file *filp,
- void __user *arg)
-{
- struct fsxattr fa;
- int error;
-
- if (copy_from_user(&fa, arg, sizeof(fa)))
- return -EFAULT;
-
- error = mnt_want_write_file(filp);
- if (error)
- return error;
- error = xfs_ioctl_setattr(filp, &fa);
- mnt_drop_write_file(filp);
- return error;
-}
-
-STATIC int
-xfs_ioc_getxflags(
- xfs_inode_t *ip,
- void __user *arg)
-{
- unsigned int flags;
-
- flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2);
- if (copy_to_user(arg, &flags, sizeof(flags)))
- return -EFAULT;
- return 0;
-}
-
-STATIC int
-xfs_ioc_setxflags(
- struct xfs_inode *ip,
- struct file *filp,
- void __user *arg)
-{
- struct xfs_trans *tp;
- struct fsxattr fa;
- struct fsxattr old_fa;
- unsigned int flags;
- int error;
-
- if (copy_from_user(&flags, arg, sizeof(flags)))
- return -EFAULT;
-
- if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
- FS_NOATIME_FL | FS_NODUMP_FL | \
- FS_SYNC_FL | FS_DAX_FL))
- return -EOPNOTSUPP;
-
- fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
-
- error = mnt_want_write_file(filp);
- if (error)
- return error;
-
- xfs_ioctl_setattr_prepare_dax(ip, &fa);
-
- tp = xfs_ioctl_setattr_get_trans(filp, NULL);
- if (IS_ERR(tp)) {
- error = PTR_ERR(tp);
- goto out_drop_write;
- }
-
- xfs_fill_fsxattr(ip, false, &old_fa);
- error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
- if (error) {
- xfs_trans_cancel(tp);
- goto out_drop_write;
- }
-
- error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
- if (error) {
- xfs_trans_cancel(tp);
- goto out_drop_write;
- }
-
- error = xfs_trans_commit(tp);
-out_drop_write:
- mnt_drop_write_file(filp);
- return error;
-}
-
static bool
xfs_getbmap_format(
struct kgetbmap *p,
@@ -2137,16 +2011,8 @@ xfs_file_ioctl(
case XFS_IOC_GETVERSION:
return put_user(inode->i_generation, (int __user *)arg);
- case XFS_IOC_FSGETXATTR:
- return xfs_ioc_fsgetxattr(ip, 0, arg);
case XFS_IOC_FSGETXATTRA:
- return xfs_ioc_fsgetxattr(ip, 1, arg);
- case XFS_IOC_FSSETXATTR:
- return xfs_ioc_fssetxattr(filp, arg);
- case XFS_IOC_GETXFLAGS:
- return xfs_ioc_getxflags(ip, arg);
- case XFS_IOC_SETXFLAGS:
- return xfs_ioc_setxflags(ip, filp, arg);
+ return xfs_ioc_fsgetxattra(ip, arg);
case XFS_IOC_GETBMAP:
case XFS_IOC_GETBMAPA: